New developments in electrochemical imaging:Revealing novel processes in chemistry, materials science and biology
讲座名称：
New developments in electrochemical imaging:Revealing novel processes in chemistry, materials science and biology
讲座时间：
2012-10-12
讲座人：
Patrick R. Unwin
形式：
校区：
兴庆校区
实践学分：
讲座内容：
讲座题目：New developments in electrochemical imaging:Revealing novel processes in chemistry, materials science and biology
讲座时间 2012年10月12日（星期五）下午2:30-4:00
讲座地点 科学馆101
讲座人 Patrick R. Unwin教授， 英国华威大学（the University of Warwick）
讲座内容 Abstract
Electrochemical imaging methods, such as scanning electrochemical microscopy (SECM), have had a significant impact in electrochemistry and interfacial chemistry, allowing reactions and fluxes to be measured and mapped locally at a wide range of interfaces, from the physical to the life sciences. However, despite considerable effort, such methods have largely remained stuck with a resolution at the several µm scale at best. We have recently developed new techniques for electrochemical imaging, notably scanning electrochemical cell microscopy (SECCM), intermittent contact (IC)-SECM, and related methods, which allow us to examine surface reactions and processes with unprecedented spatial resolution, ultimately at the nanoscale. This talk will introduce these methods and show how they can be used to probe surface processes. A particular focus of our work is new forms of carbon, which are attracting immense interest for energy storage and conversion, and sensor systems. Our novel methods are providing considerable new insights on the intrinsic activity. The power of SECCM, in particular, is evident through recent exemplar studies of: single nanoparticles; different parts of single-walled nanotubes to develop a faithful picture of activity; graphene; graphite; and polycrystalline conducting diamond. In all cases, surprising new features are revealed that have been missed or misinterpreted in macroscale studies. Prospects for future uses of electrochemical imaging in the life sciences (including live cell imaging) and in materials characterization will be highlighted.
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